VirtualDisplaySurface.cpp revision 851cfe834295224cd64bdd499872b95b19c4de8c
1/* 2 * Copyright 2013 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17#include "VirtualDisplaySurface.h" 18#include "HWComposer.h" 19 20// --------------------------------------------------------------------------- 21namespace android { 22// --------------------------------------------------------------------------- 23 24VirtualDisplaySurface::VirtualDisplaySurface(HWComposer& hwc, int disp, 25 const sp<IGraphicBufferProducer>& sink, const String8& name) 26: mHwc(hwc), 27 mDisplayId(disp), 28 mSource(new BufferQueueInterposer(sink, name)), 29 mName(name) 30{} 31 32VirtualDisplaySurface::~VirtualDisplaySurface() { 33 if (mAcquiredBuffer != NULL) { 34 status_t result = mSource->releaseBuffer(Fence::NO_FENCE); 35 ALOGE_IF(result != NO_ERROR, "VirtualDisplaySurface \"%s\": " 36 "failed to release buffer: %d", mName.string(), result); 37 } 38} 39 40sp<IGraphicBufferProducer> VirtualDisplaySurface::getIGraphicBufferProducer() const { 41 return mSource; 42} 43 44status_t VirtualDisplaySurface::compositionComplete() { 45 return NO_ERROR; 46} 47 48status_t VirtualDisplaySurface::advanceFrame() { 49 Mutex::Autolock lock(mMutex); 50 status_t result = NO_ERROR; 51 52 if (mAcquiredBuffer != NULL) { 53 ALOGE("VirtualDisplaySurface \"%s\": " 54 "advanceFrame called twice without onFrameCommitted", 55 mName.string()); 56 return INVALID_OPERATION; 57 } 58 59 sp<Fence> fence; 60 result = mSource->acquireBuffer(&mAcquiredBuffer, &fence); 61 if (result == BufferQueueInterposer::NO_BUFFER_AVAILABLE) { 62 result = mSource->pullEmptyBuffer(); 63 if (result != NO_ERROR) 64 return result; 65 result = mSource->acquireBuffer(&mAcquiredBuffer, &fence); 66 } 67 if (result != NO_ERROR) 68 return result; 69 70 return mHwc.fbPost(mDisplayId, fence, mAcquiredBuffer); 71} 72 73void VirtualDisplaySurface::onFrameCommitted() { 74 Mutex::Autolock lock(mMutex); 75 if (mAcquiredBuffer != NULL) { 76 // fbFence signals when reads from the framebuffer are finished 77 // outFence signals when writes to the output buffer are finished 78 // It's unlikely that there will be an implementation where fbFence 79 // signals after outFence (in fact they'll typically be the same 80 // sync_pt), but just to be pedantic we merge them so the sink will 81 // be sure to wait until both are complete. 82 sp<Fence> fbFence = mHwc.getAndResetReleaseFence(mDisplayId); 83 sp<Fence> outFence = mHwc.getLastRetireFence(mDisplayId); 84 sp<Fence> fence = Fence::merge( 85 String8::format("HWC done: %.21s", mName.string()), 86 fbFence, outFence); 87 88 status_t result = mSource->releaseBuffer(fence); 89 ALOGE_IF(result != NO_ERROR, "VirtualDisplaySurface \"%s\": " 90 "failed to release buffer: %d", mName.string(), result); 91 mAcquiredBuffer.clear(); 92 } 93} 94 95void VirtualDisplaySurface::dump(String8& result) const { 96} 97 98// --------------------------------------------------------------------------- 99} // namespace android 100// --------------------------------------------------------------------------- 101